export function formatDate (date, fmt) {
  if (/(y+)/.test(fmt)) {
    fmt = fmt.replace(
      RegExp.$1,
      (date.getFullYear() + '').substr(4 - RegExp.$1.length)
    )
  }
  const o = {
    'M+': date.getMonth() + 1,
    'd+': date.getDate(),
    'h+': date.getHours(),
    'm+': date.getMinutes(),
    's+': date.getSeconds()
  }
  for (const k in o) {
    if (new RegExp(`(${k})`).test(fmt)) {
      const str = o[k] + ''
      fmt = fmt.replace(
        RegExp.$1,
        RegExp.$1.length === 1 ? str : padLeftZero(str)
      )
    }
  }
  return fmt
}

function padLeftZero (str) {
  return ('00' + str).substr(str.length)
}

// 格式化时间
export const formatTime = (time) => {
  let h = parseInt(time / 60 / 60)
  let m = parseInt((time / 60) % 60)
  let s = parseInt(time % 60)
  h = h === 0 ? '' : h < 10 ? `0${h}` : h
  m = m < 10 ? `0${m}` : m
  s = s < 10 ? `0${s}` : s
  return h ? `${h}:${m}:${s}` : `${m}:${s}`
}
